Departamento de Física

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Navegando Departamento de Física por Assunto "astronomical data bases: miscellaneous"

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    Data Release 2 of S-PLUS: Accurate template-fitting based photometry covering ∼1000 deg2in 12 optical filters
    (2022-04-01) ALMEIDA-FERNANDES, F.; SAMPEDRO, L.; HERPICH, F. R.; MOLINO, A.; BARBOSA, C. E.; BUZZO, M. L.; OVERZIER, R. A.; DE LIMA, E. V. R.; NAKAZONO, L. M. I.; OLIVEIRA SCHWARZ, G. B.; PEROTTONI, H. D.; BOLUTAVICIUS, G. F.; GUTIERREZ-SOTO, L. A.; SANTOS-SILVA, T.; VITORELLI, A. Z.; WERLE, A.; WHITTEN, D. D.; COSTA DUARTE, M. V.; BOM, C. R.; COELHO, P.; SODRE, L.; PLACCO, V. M.; TEIXEIRA, G. S. M.; ALONSO-GARCIA, J.; Cassio Barbosa; BEERS, T. C.; BONATTO, C. J.; CHIES-SANTOS, A. L.; HARTMANN, E. A.; LOPES DE OLIVEIRA, R.; NAVARETE, F.; KANAAN, A.; RIBEIRO, T.; SCHOENELL, W.; MENDES DE OLIVEIRA, C.
    © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.The Southern Photometric Local Universe Survey (S-PLUS) is an ongoing survey of ∼9300 deg2 in the southern sky in a 12-band photometric system. This paper presents the second data release (DR2) of S-PLUS, consisting of 514 tiles covering an area of 950 deg2. The data has been fully calibrated using a new photometric calibration technique suitable for the new generation of wide-field multifilter surveys. This technique consists of a χ2 minimization to fit synthetic stellar templates to already calibrated data from other surveys, eliminating the need for standard stars and reducing the survey duration by ∼15 per cent. We compare the template-predicted and S-PLUS instrumental magnitudes to derive the photometric zero-points (ZPs). We show that these ZPs can be further refined by fitting the stellar templates to the 12 S-PLUS magnitudes, which better constrain the models by adding the narrow-band information. We use the STRIPE82 region to estimate ZP errors, which are 10 mmags for filters J0410, J0430, g, J0515, r, J0660, i, J0861 and z; 15 mmags for filter J0378; and 25 mmags for filters u and J0395. We describe the complete data flow of the S-PLUS/DR2 from observations to the final catalogues and present a brief characterization of the data. We show that, for a minimum signal-to-noise threshold of 5, the photometric depths of the DR2 range from 19.1 to 20.5 mag (measured in Petrosian apertures), depending on the filter. The S-PLUS DR2 can be accessed from the website: https://splus.cloud.